Code No. C1396
Engine torque input refusal
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- If there is any
problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis,
diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table
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- Whenever ECU is replaced, ensure that the CAN bus lines are normal.
- When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out
the calibration of the steering wheel sensor and the G and yaw rate sensor (Refer to and ).
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OPERATION
ASC-ECU receives the engine system-related signal from the engine-ECU via CAN bus lines.
DIAGNOSIS CODE SET CONDITIONS
When the torque request rejection signal from the engine-ECU indicates the rejection state,
ASC-ECU determines that the trouble occurs and sets this diagnosis code.
PROBABLE CAUSES
- The CAN bus line is defective.
- Malfunction of engine-ECU
- Malfunction of the hydraulic unit assembly (integrated with ASC-ECU)
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STEP 1. M.U.T.-III CAN bus diagnosis
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 3.
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 Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
On completion, go to Step 2.
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STEP 2. Diagnosis code recheck after resetting CAN bus lines
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Q.
Is diagnosis code No. C1396 set?
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Go to Step 3.
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This diagnosis is complete.
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STEP 3. Use M.U.T.-III to confirm a diagnosis code of other systems.
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Check that the engine-ECU sets a diagnosis code.
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Q.
Is the diagnosis code set?
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Diagnose the engine-ECU (Refer to GROUP 13A - Troubleshooting ).
Then go to Step 7.
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Go to Step 4.
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STEP 4. Engine-ECU coding data check
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Use the M.U.T.-III to check whether the engine-ECU has stored the correct coding data
(Refer to GROUP 00 - Coding List <Vehicles
for GCC>, <Vehicles for THAILAND>).
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Q.
Is the diagnosis code other than code No. C1396 set?
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Go to Step 5.
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Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU ).
Then go to Step 7.
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STEP 5. M.U.T.-III data list
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Check the following service data (Refer to ).
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- Item No.13: Allow A.S.C. torque request
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Q.
Is the check result normal?
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Go to Step 6.
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Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU ).
Then go to Step 7.
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STEP 6. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set.
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(1)Erase the set diagnosis code.
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(2)Ignition switch: "LOCK" (OFF)
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Q.
Is diagnosis code No. C1396 set?
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Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
Then go to Step 7.
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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STEP 7. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set.
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(1)Erase the set diagnosis code.
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(2)Ignition switch: "LOCK" (OFF)
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Q.
Is diagnosis code No. C1396 set?
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Return to Step 3.
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This diagnosis is complete.
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